Battery Charging Principles and Systems in use at the Swedish Telecommunications Administration - Present and Planned Installations

The charging methods for stationary accumulators for use in telecommunication installations have changed through out the years. The reason for this is not only the development and the achievements in the battery technology field and the new methods and components in the control area but also the better knowledge of demands and result of the operation and maintenance work in the field. From the administrations point of view it has become necessary to find solutions which balance procuring, operation, and maintenance costs. Some of the solutions, mainly for the smaller installations, are simple and cheap, while others are quite sophisticated and hence relatively costly. The paper intends to view the development in the area concerned and to give a closer information on some of our present and future applications.